Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

donate to eham
   Home   Help Search  
Pages: [1] 2 3 4 Next   Go Down
  Print  
Author Topic: What antenna do you use on 30m?  (Read 5882 times)
VK5EEE
Member

Posts: 939




Ignore
« on: July 28, 2017, 05:23:10 PM »

What antenna do you use if you go on 30m, or do you have no antenna that you can use on 30m?
I'll start off... planning to add more, but for now it's a dipole fed with 300 Ohm via 1:1 Balun and Z match, 15m (2*7.5m) long and up around 7.5m in center (10m at ends so it is Y shaped vertically). Ends are producing null to North America and it is radiating well enough on the sides to Europe with Long Path producing best results from 1.30pm peaking around 2.30pm local time! 100W power. I have reached up to S7 in and from Europe with this very modest set up, long path, during the day.
My multiple source broadband noise level @2.3kHz is S5 at best, S7 on worst days. With narrow filter S5 noise is cut down to S3.
Logged

Long Live Real Human CW and wishing you many happy CW QSO - 77 - CW Forever
VK5EEE
Member

Posts: 939




Ignore
« Reply #1 on: July 29, 2017, 01:43:34 AM »

Slow moving, maybe folks are embarrassed to admit they have NO antenna for 30m  Roll Eyes Grin Grin Grin

So, here goes again: now I have TWO 30m antennas up, and more to come! I added a sloper 12m long fed with 300 ohm feeder, sloping from 10m in the West to 4m in the East, in the hope that it may work better for Eastern VK and Pacific/USA.

30mb should be open to USA but few likely to be awake...
Logged

Long Live Real Human CW and wishing you many happy CW QSO - 77 - CW Forever
G4LNA
Member

Posts: 125




Ignore
« Reply #2 on: July 29, 2017, 02:01:53 AM »

I was tucked up in bed at 01:23 this morning  Roll Eyes

Only one antenna, 2x15M top about 9M over the ground fed with a home brew remotely tuned S match at the bottom of the feeders. As you probably guess, it is an all band antenna.
The ends are roughly NE-SW so broadside there's a nice lobe in your direction.





I'm on 30M at the moment, but can only hear two stations on the whole band.
Logged

M0LEP
Member

Posts: 479




Ignore
« Reply #3 on: July 29, 2017, 02:17:54 AM »

Ah, timezones...

For SOTA, 30 metres is one of the links in my dipole, which goes up in inverted-V on a fishing pole. It covers 80, 60, 40, 30, 20 and 17, with 15 usable on the 40 links.)

At home, the auto-AMU will match the G7FEK to 30 metres after a fashion. I suppose (but havn't tried) that the new rig might, at a pinch, match the 60 metres EFHA as a 30 metre EFFW, but as it's for 60 metres NVIS I doubt it'd do 30 metres DX...
Logged
GW3OQK
Member

Posts: 379




Ignore
« Reply #4 on: July 29, 2017, 02:30:38 AM »

I have a 13 metre vertical wire inside a fibreglass pole, with some radials and earth spikes. According to eznec it's maximum radiation is at 20 deg elevation. This length gives maximum current about half way up the wire, which minimises currents and losses in the ground wires. There is a remote tuner at its base so it tunes on all bands. It is 40 m from the house.

It received VMW, Australia, on 10.555 last night at dusk. 

73
Andrew
Logged
G4LNA
Member

Posts: 125




Ignore
« Reply #5 on: July 29, 2017, 02:39:48 AM »

I will add, this is the only antenna I can use on 30M because of the VDSL crap, any other antenna give a noise level of S6-7, as it is at the moment with the doublet the noise level is hovering around S3 or less with a 500Hz filter. So those nulls come in handy.
Logged

W1JKA
Member

Posts: 2074




Ignore
« Reply #6 on: July 29, 2017, 02:53:01 AM »

I made a 30m inverted V dipole 24 ft. NE/SW and a 40M Windom same direction I can use on 30M with my Elecraft T1 tuner about 3:1 for my cross country QRP/CW contacts to West coast and DX into Central Europe/Scandinavia with my K1 and MFJ Cub following the grey line from my more or less mid location in Maine.
Logged
M0LEP
Member

Posts: 479




Ignore
« Reply #7 on: July 29, 2017, 03:08:26 AM »

Ah, timezones... ... EFHA ...
Too not-yet-awake... That should of course have been "EFHW" (End Fed Half Wave).
Logged
M0LEP
Member

Posts: 479




Ignore
« Reply #8 on: July 29, 2017, 03:18:47 AM »

because of the VDSL crap
Yeah, VDSL helps make the sub-urban environment round here a bit of an RFI mess. A lot of it comes from the old overhead copper drop-lines still in use for about half the houses round here. At home it's most disruptive CW-wise for me on 40 metres, but the hash of noise is all over the lower parts of HF. When the next generation of *DSL comes along it'll probably stray up as far as VHF as well...
Logged
K3STX
Member

Posts: 1571




Ignore
« Reply #9 on: July 30, 2017, 06:31:24 PM »

Two antennas for 30M. Best one is my 80 meter 1/4 wavelength vertical (resonant at 3.5 MHz) and I use my tuner. Also use my 100' long ladder line fed dipole up 50 feet, but not as good for DX.

Paul
Logged
K1HMS
Member

Posts: 457




Ignore
« Reply #10 on: July 30, 2017, 07:20:13 PM »

A vertical dipole.
I took a Radio Wavz 40m wire dipole ($40) and shorten it for 30m. One end of the dipole is tied to a haul up rope over a branch at 67 feet, the other end has a water bottle as a weight. The supplied balun is in the center. I use a similar antenna on 20m.   Both are great for DX, terrible for NVIS, near perfect full bands matches, and great reverse beacon returns out to 7000 miles.
As a dipole it does not need radials and has reduced ground losses due to height above ground.


Logged
VK5EEE
Member

Posts: 939




Ignore
« Reply #11 on: July 30, 2017, 07:33:58 PM »

K3STX interesting did not yet try vertical on 30m, afraid of already bad noise levels at times. But may try in future. For 80m doublet I also had one at old QTH, it sloped from 9m down to 1.5m direction North and it had great results all across NW (to Europe), N (Japan) and NE (USA) at the same time, it worked exceedingly well. I miss that. At new QTH I cannot yet get USA, but doing well enough to Europe, considering it's just a 2X7.5m doublet up 10m. Are you in a low noise location?

K1HMS which way is it oriented? Which directions does it cover well?
Logged

Long Live Real Human CW and wishing you many happy CW QSO - 77 - CW Forever
KD8IIC
Member

Posts: 596




Ignore
« Reply #12 on: July 30, 2017, 08:29:54 PM »

 Here's something of note to those who own a Cushcraft MA160V ; They load on 30m superbly when adjusted right!
 It did not affect the use or performance of 160 low end CW which I tune the top for.
 This 30m use is sans tuner also!
Logged
DU7DVE
Member

Posts: 321




Ignore
« Reply #13 on: July 31, 2017, 03:12:33 AM »

135 foot doublet. 450 ohm feedline.
Logged
OZ8AGB
Member

Posts: 296




Ignore
« Reply #14 on: July 31, 2017, 04:30:20 AM »

80m horizontal loop with 450 ohm ladder line feeder.
Logged
Pages: [1] 2 3 4 Next   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!